Programming Language Conference in Russia

:: by Artem Pelenitsyn

In April 3—5 I took part into a Russian conference exclusively devoted to programming languages: Programming Languages and Compilers (Google.Translated version of the site). I was a member of organizing committee and had a paper there.

This is the first conference in Russia highly focused on our area of PL. At least for the last several decades (I believe, there were conferences of the kind back in USSR). The conference was devoted to the memory of prominent Soviet PL-researcher from Rostov-on-Don, Adolf Fuksman who worked on ideas quite similar to what we know as the aspect-oriented programming back in the 70-s.

Rank Polymorphism

:: by Justin Slepak, array language,

Rank polymorphism gives you code reuse on arguments of different dimensions. Take a linear interpolation function (let’s just call it lerp) for scalars:

(λ ((lo 0) (hi 0) (α 0)) (+ (* lo (- 1 α)) (* hi α)))

The number marks on each argument indicate the expected “rank” of the argument: how many dimensions it should have. In this case, each one is marked 0, indicating a scalar (i.e., 0-dimensional) argument. The function is usable as-is for

  • α-blending two RGB pixels

  • dimming or brightening an image

  • fade transition between video scenes